CVE-2026-105922 - Vulnerability Details

- vllm-project vLLM Penalty utils.py get_token_bin_counts_and_mask denial of service

Description

A security flaw has been discovered in vllm-project vLLM up to 0.31.0. This impacts the function get_token_bin_counts_and_mask of the file vllm/model_executor/layers/utils.py of the component Penalty Handler. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Published: 2026-10-06

Score: 5.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

A flaw in the Penalty Handler of the vllm-project vLLM library, located in the get_token_bin_counts_and_mask routine, allows remote actors to supply crafted input that causes the process to become unresponsive, resulting in a denial-of-service condition. The weakness involves improper input validation (CWE-248) and improper resource shutdown (CWE-404).

Affected Systems

vllm-project vLLM versions up to and including 0.31.0 are affected; no other version information is provided.

Risk and Exploitability

The CVSS score of 5.3 categorizes the vulnerability as moderate severity, and EPSS data is not available. The vulnerability is not listed in the CISA KEV catalogue. The description confirms that remote exploitation is possible and a public exploit has already been released, indicating that the attack can be performed without local access. The likely attack vector is remote input manipulation to the Penalty Handler, leading to a denial of service on the targeted system.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

vllm-project

vLLM

affected

Version	Status	Constraints
`0.1`	affected	—
`0.2`	affected	—
`0.3`	affected	—
`0.4`	affected	—
`0.5`	affected	—
`0.6`	affected	—
`0.7`	affected	—
`0.8`	affected	—
`0.9`	affected	—
`0.10`	affected	—
`0.11`	affected	—
`0.12`	affected	—
`0.13`	affected	—
`0.14`	affected	—
`0.15`	affected	—
`0.16`	affected	—
`0.17`	affected	—
`0.18`	affected	—
`0.19`	affected	—
`0.20`	affected	—
`0.21`	affected	—
`0.22`	affected	—
`0.23`	affected	—
`0.24`	affected	—
`0.25`	affected	—
`0.26`	affected	—
`0.27`	affected	—
`0.28`	affected	—
`0.29`	affected	—
`0.30`	affected	—
`0.31.0`	affected	—

Configuration 1 [-]

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions

Vllm-project

Vllm

95%

Version	Status	Scheme	Platform
`0.1`	affected	generic	—
`0.2`	affected	generic	—
`0.3`	affected	generic	—
`0.4`	affected	generic	—
`0.5`	affected	generic	—
`0.6`	affected	generic	—
`0.7`	affected	generic	—
`0.8`	affected	generic	—
`0.9`	affected	generic	—
`0.10`	affected	generic	—
`0.11`	affected	generic	—
`0.12`	affected	generic	—
`0.13`	affected	generic	—
`0.14`	affected	generic	—
`0.15`	affected	generic	—
`0.16`	affected	generic	—
`0.17`	affected	generic	—
`0.18`	affected	generic	—
`0.19`	affected	generic	—
`0.20`	affected	generic	—
`0.21`	affected	generic	—
`0.22`	affected	generic	—
`0.23`	affected	generic	—
`0.24`	affected	generic	—
`0.25`	affected	generic	—
`0.26`	affected	generic	—
`0.27`	affected	generic	—
`0.28`	affected	generic	—
`0.29`	affected	generic	—
`0.30`	affected	generic	—
`0.31.0`	affected	generic	—

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade vllm to the latest release that contains the fix for the get_token_bin_counts_and_mask issue
Disable or limit the use of the Penalty Handler for any user input that cannot be fully validated
Implement request throttling, input validation checks, and application‑level timeouts to reduce the effectiveness of denial‑of‑service attempts

Generated by OpenCVE AI on October 7, 2026 at 03:44 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00311.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://gist.github.com/Yunzez/5c70a3bb328eaf6d646b9d31e879dc4a#file-repro_prompt_embeds_penalties_engine_crash-py
https://github.com/vllm-project/vllm/
https://github.com/vllm-project/vllm/issues/57719
https://nvd.nist.gov/vuln/detail/CVE-2026-105922
https://vuldb.com/cve/CVE-2026-105922
https://vuldb.com/submit/992707
https://vuldb.com/vuln/413896
https://vuldb.com/vuln/413896/cti
https://www.cve.org/CVERecord?id=CVE-2026-105922

History

Fri, 09 Oct 2026 14:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Vllm Vllm vllm
CPEs		cpe:2.3:a:vllm:vllm::::::::
Vendors & Products		Vllm Vllm vllm

Wed, 07 Oct 2026 00:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-248
References		https://nvd.nist.gov/vuln/detail/CVE-2026-105922 https://www.cve.org/CVERecord?id=CVE-2026-105922
Metrics	threat_severity `None`	threat_severity `Important`

Tue, 06 Oct 2026 15:00:00 +0000

Type	Values Removed	Values Added
Description		A security flaw has been discovered in vllm-project vLLM up to 0.31.0. This impacts the function get_token_bin_counts_and_mask of the file vllm/model_executor/layers/utils.py of the component Penalty Handler. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Title		vllm-project vLLM Penalty utils.py get_token_bin_counts_and_mask denial of service
First Time appeared		Vllm-project Vllm-project vllm
Weaknesses		CWE-404
CPEs		cpe:2.3:a:vllm-project:vllm::::::::
Vendors & Products		Vllm-project Vllm-project vllm
References		https://gist.github.com/Yunzez/5c70a3bb328eaf6d646b9d31e879dc4a#file-repro_prompt_embeds_penalties_engine_crash-py https://github.com/vllm-project/vllm/ https://github.com/vllm-project/vllm/issues/57719 https://vuldb.com/cve/CVE-2026-105922 https://vuldb.com/submit/992707 https://vuldb.com/vuln/413896 https://vuldb.com/vuln/413896/cti
Metrics		cvssV2_0 `{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:C'}` cvssV3_0 `{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C'}` cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}`

Subscriptions

Vllm Vllm

Vllm-project Vllm

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-10-06T14:45:15.075Z

Updated: 2026-10-06T17:39:56.919Z

Reserved: 2026-10-06T05:52:18.134Z

Link: CVE-2026-105922

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2026-10-06T15:17:17.727

Modified: 2026-10-09T14:13:02.383

Link: CVE-2026-105922

Redhat

Severity : Important

Publid Date: 2026-10-06T14:45:15Z

Links: CVE-2026-105922 - Bugzilla

OpenCVE Enrichment

Updated: 2026-10-07T06:45:12Z

Weaknesses

CWE-248
Uncaught Exception
CWE-404
Improper Resource Shutdown or Release

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

Subscriptions

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